Question

1. list the 2 main body cavities.
2. control of lactation is by negative feedback homeostasis. true or false.

Explanation:

Question 3

The two main body cavities in the human body are the dorsal (posterior) cavity and the ventral (anterior) cavity. The dorsal cavity includes the cranial cavity (housing the brain) and the spinal cavity (housing the spinal cord). The ventral cavity is divided into the thoracic cavity (containing heart, lungs, etc.) and the abdominopelvic cavity (containing digestive organs, reproductive organs, etc.).

Lactation (milk production) is controlled by positive feedback, not negative feedback. In positive feedback, the response enhances the original stimulus. For lactation, when a baby suckles, it stimulates the release of oxytocin and prolactin, which further increase milk production and release, creating a cycle that amplifies the process until the baby stops suckling. Negative feedback works to maintain homeostasis by reversing a change (e.g., regulating body temperature or blood glucose). So the statement is false.

Answer:

The two main body cavities are the dorsal (posterior) cavity and the ventral (anterior) cavity.

Question 4